利用熔渣电解对钢液进行脱氧和合金化

项目名称： 利用熔渣电解对钢液进行脱氧和合金化

项目编号： No.51304018

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 张国华

作者单位： 北京科技大学

项目金额： 25万元

中文摘要： 本课题拟通过电化学的方法实现钢液的脱氧和Si、Mn的合金化操作。在传统的炼钢过程中，需要首先将氧化物矿冶炼成铁合金，然后将铁合金加入到钢液中进行脱氧和合金化。本研究通过在熔渣和钢液中放置电极并施加直流电场，使熔渣发生电解，在渣钢界面析出合金元素并直接进入钢液完成钢液的脱氧和合金化操作，可避免铁合金的生产，有利于节能减排。本课题将通过对CaO-Al2O3-SiO2-FeO渣系的电解完成钢液的脱氧操作；通过对CaO-Al2O3-SiO2-MnO渣系的电解完成钢液的Si和Mn的合金化操作。将在恒电位以及恒电流两种模式下研究渣成分、温度以及阳极材料(石墨和金属陶瓷)的影响，旨在实现对钢液溶解氧的脱除和Si、Mn含量的精确控制。CaO-Al2O3-SiO2-FeO和CaO-Al2O3-SiO2-MnO体系的电导率以及成分、温度和电化学参数对熔渣中不同金属离子的析出顺序的影响是本课题重点要研究的内容。

中文关键词： 熔渣；电化学；脱氧；合金化；电导率

英文摘要： The present study is aimed at completing the deoxidation and alloying operations of Si and Mn of liquid steel by the way of electrochemical method. In the traditional steelmaking process, the ferroalloy is first prepared by smelting the oxide ores, and then added into the liquid steel for deoxidation and alloying. The deoxidation and alloying operations in this study will be completed directly by the electrolysis of molten slag in which process the alloy elements are produced in the slag-steel interface when the electric voltage is applied to the electrodes which are placed in the steel and slag respectively. So, the preparation of ferroalloy can be avoided which is beneficial to the energy conservation and reduction of pollutant emissions. The deoxidation operation will be achieved by electrolyzing CaO-Al2O3-SiO2-FeO slag, while the alloying operations of Si and Mn will be achieved by electrolyzing CaO-Al2O3-SiO2-MnO slag. In order to deoxidize the dissolved oxygen and precisely control the contents of Si and Mn in the steel, the influences of composition of molten slag and temperature as well as the anode material (carbon and ceramet) on the electrolysis of molten slag at the conditions of potentiostatic and galvanostatic will be studied. The electrical conductivity of CaO-Al2O3-SiO2-FeO and CaO-Al2O3-SiO2-MnO

英文关键词： molten slags；electrochemistry；deoxidation；alloying；electrical conductivity